Drilling machine



June 30, 1925.

G. H. GILMAN DRILLING MACHINE Filed July 30, 1921 2 Sheets-Sheet l v 47y v June 30, 1925. 1,543,765

G. H. GILMAN DRILLING MACHINE Filed July 30, 1921 2 Sheets-Sheet 2Patented June 30, 1925.

GEORGZWHI GIIIIYIAN, OF. BELLMONT', MASSAOHFUSETTSJ DRILLING At ncatimrfiled July so,

TQaZZ "'w/z can it map; 006 2060792 Be it hnown-i that I; Gnonen HiGrimes. at citizen of: the-Unitech StitilfiS-gyfllld i roSi=- dentotjBelmont, county; of lMiddlesex and State of Massachusetts, haveinventeda an improvement in Drilling Machine, of which the 1 following;description, in connec-e tion withthe accompanying drawings, is: asspecification,like: characters on the drawingszrepresenting like-parts,7 I My. invention..-relates 1to.drillingi.machines andparticularly. tothe mounting for; the drilliirg-., tool-1 and? itsaactuatOr. I v

'Myainventionwwill; be bestnnderstood; fromthe following descriptionwhen; read; in light of the accompanying drawings of. specific:embodiment of my. invention see lected for, illustrative nu1poses,whilethe scope of my invention will be particularly pointedmut in theappended. claims.

- Referring tot-li edrawingsz Eigz. 111 is an: elevation of: a breast-3stoper and its: mounting; constructed according .to my. invention; v

Fig; is a detaillonpan enlarged, scale of.

' pnrts sliowlrbytFig,1-when[moved-.to another position; I

Fig is' a, sectio nonxthe line 3+3: of; 's 1; w I

Fig. 4-is a plan of thebase membergjand, Fig; twists seotionionthemete-5 of Referring to. the drawings, lflhave shown drilling; tool Q 1and its, actuator 3. t These inayvb'e of any. suitable or usualrtypeuand as shown-.the'toolvis a drill :bitandthe actnf ator. afinidpressure operstedhannner. drill: The mounting fort the.actuatorcomprises feeding; mechanism for. moving the actuator. toward.and away tiom;-the. work, and elevating and swivelling connection to asupport, for the machine. .1 v The feeding. inec'hanisnrfor the.actuator comprises the shell 5. having. to rmed therein the. oppositelylocated. gnidewaysj 7" winch receive. tlieactuator guide menihersfi andalthough the latter may lie-formed" 111-. tegrally or otherwise. with;the (ca in of the actuator I. have shown them as, part of the, cradle'10, .to the ears- 11, ofiwhich; theactue ator 'is. secured" by. meansot'th'e actuator 7 side bolts. 12,,. For moving the actuator back. andvforth along th'e ways any suitable or usnahmeans,may be provided, asterexample, a teed screw, the hiindle -of"wnich is indicated." at, 131." Asthe-details of the MACHINE;

19.21. Seriaiiito. 188;5961;

actuator: and feedingmechanisnt do not form 1 part of my presentinvention, the same willnot be furthen described except. as necessary.to show how they are apnlietl' to l the.-

like bevelled surface 17? Resting against;

the bottom ottheshellisa member 19hoving, the upstanding portion.conforming tothesuriace. 15 of the shell. Aitthe side: of the member 19,and; new the surftice. 1'?" of the shell, I tt'brnr saitlanemher. withit bevelled surface 25. oppositely inclined; to thesurface 17. and for,engaging both of, these surfaces. I provideannemlier 25-01" length.approximatingthat of} themember 19 andsecnred theretohy means of a bolt27. As w-illhe apparent when the bolt is loose the members 19. and 25 mav be slid longitudinally. of the shell to the positiondesired and. thenclamped in place by tights ening theboltr.

o For. attaching the elevatinggmechanism.to' the member 19 I integrallyform with the; lowermostsiderofithe member 19 four perforated lugs 29,through pairs of which-pass; the. holtsor pins 31. On; the outer end-0teachibolt lpivot-onvend ofa link'33. The other, ends of the; linkslpivot to similarly arranged holts 851carried in the perforated lugs, 36formed; integrally with thebase member 37. 1 Thesepivotedflinks"constitute the. eli'eveting}mechanism.v

The body oi" the base member. 37 I- have shown formed as a hollowcylinder. From the upper onterusurface of this cylinder diates the arms38 carryingithe"lugs .36 and on the lower end of the cylinder-I form ifdesired a flange providingthe frusto.-coni-' cal surface 39 serving as atrunnion. The trunnion may besecuredto any suitablesupport ior the.machine As shown, this'support is exemplifiechby the arm ll carried-bya" mine column. Forattaching'the trune niointo the arm 41 Ihave shown aknown attaching means wliiclrcoinprises the members i3'and45 adapted tobe clampedlin tlCl-I jnsted position tov the baipby means of bolts 45?.The member 43' is provided'with a recess i9fconforming to about180"oijthe irustoronical' surface. of. the trunnion and has pivotedthereto at 51 a member 53 provided with a surface 55 shaped to engagethe fru-sto-conical surface of the trunnion and adapted to be adjustedrelatively to the member 43 by means of the nut 57 and bolt 59. a Aswill be understood by those skilled in the art, by this attachmentthetrunnion may be swivelled relatively to the bar 41 and clamped inadjusted position. 7

It will be understod that by means of the four links 33'the shell may bemoved toward and away from the base 1nember,Figs 1 and 2 respectivelyshowing the extremes of movement.

I provide each of one pair of the arms 88 with upstanding portions 63 onwhich the member 19 is adapted to rest in the position 7 of parts shownby Fig. 2. Preferably, but

' not necessarily, the links 33 are of'equal length and the pins 31 andso arranged 'as to lie at the corners of a parallelogram in order thatwhen the shell is raised and lowered every posit on assumed by theactuator and drill bit willbe parallel with all other positions assumed.

For operating the elevating mechanism I have shown a lever 65 formedintegrally .with one of the links 33 and provided with a handle 67. Forholdingthe'partsin their adjusted position relatively to the base Iprovide a quadrant-bar 69 carried on arms 71 secured by welding orotherwise to the projections 73 and 75of one of the arms 38.

' To the quadrant-bar I may clamp' the lever and for this purpose Iprovide the lever adjacent the outer side of the bar with a lug 77through, which passes the pin 79 engaging the bifurcations 81 of theclamp 83. The bifurcations of the clamp adjacent the pin 79 areintegrally connectedto the oppo site end portions of the jaw 85 which isadapted to grip the bar 69 and to clamp it betweenthe jawand the lever65'. For actuating the clamp, the end thereof remote from the pin 79 isprovided with a screwthreaded perforation 87 receiving the screw 89, theend of which engages the surface of the lever 65. Turning of theoperating handle 91 of the screw in the proper direction will causethelever 87 to be forced away from the lever and this willcause the aw togrip the quadrant-bar. 'Io permit assemblage of the clamp on the lever65 the handle 67 maybe either welded tothe lever For supporting theshell when the 3 parts are in the posltlon shown by Fig. 2

which the parts may be moved into the po- .sition shown by Fig. 2 topermit the'bit be am notlimited thereby to its particular details andarrangement of parts and that wide deviations may bemade from thisembodiment and parts described omitted or other parts substitutedtherefor without departing from the spirit of my invention.

1. The combination'with a drill steel actuator of a support thereforcomprising a base and a pair of links, means providing a pivotalconnection" between each link and saidractuator and base, the fourpivots thus 7 formed being arranged to lie at thecorners of aparallelograni, and to swing-in a plane 7 parallel to the axis of thedrill steel so as, to raise andlower-the actuator and move it toward andaway from the work, a lever for operating said "links to cause them toswing for moving actuator, and releasable locking means for preventingmovement of saidactuator. i

2. I11 a machine of the character (le scribed, a drill steel actuator, atrunnion support, parallel motion means for swinging said actuator in aplane including its 1 axis, said means includ ng a link, means providinga pivotal connection between said link and said support and betweensaidlink and said actuator, a lever rigidly secured to said link forswingingsa'idlink, and releasable locking means for preventing, movement of'said actuator. V

3.5 In a 'machine of the character described, a tool, its actuator, afeed shell, 21 trunnion support, a pair of equal links pivoted atopposite ends respectively and secured to said shell and support, alever carried by one of said links, a quadrant-bar carried by saidsupport, andmeans for se curing sald lever to said bar. 7

4. In a machine of the character described,'a drilling-tool, itsactuator, a feed shell, a' trunnion support, a pair of equal linkspivoted at opposite "ends respectively and secured to said shelland-support, a lever carried by one of saidlinks, a quad: rant-barcarried by said support, and means for clampingsaid lever in adjustedposition along said bar. j i 3 V 5. In a 7 machine of thecharacterdescribed, a tool, its actuator, a feed shellfa support, forsaid machine, a pair of equal links pivoted at opposite endsrespectively and secured to said shell and support, a lever carried byone of saidlinks, a quadrant-bar carried by said support, and means ihammer drill carrying said drill steel, a feed shell slidably supportingsaid hammer drill, a support for said machine, a pair of equal linkspivoted at opposite ends respectively and secured to said shell andsupport, a lever ope 'atively connected to one of said links for-aising'and lowering said hammer drill relatively to said support, andmeans for adjust-ably securing said lever to said support. t

7. In a drilling machine, a drill steel, a hammer drill carrying saiddrill steel, a feed shell slid-ably supporting said hammer drill, asupport for said machine, a pair of equal links pivoted at opposite endsrespectively and secured to said shell and support, a lever operativelyconnected to one of said links for raising and lowering said hammerdrill relatively to said support, and means including a member attachedto said support and slidably connected to said lever for adjustablysecuring said lever in difi'enent positions.

8. In a drilling machine, a drill steel, a hammer drill carrying saiddrill steel, means providing a pair of pivoted links with a leverattached to one. link, feeding means slidably supporting said hammerdrill including a member to which one end portion of each link ispivoted, a support for the machine including a member to which theopposite end portion of each link is pivoted, and means including a partattached to one ol? said members and slidably connected to said leverfor adjustably securing said lever in different positions.

In testimony whereof, I have signed my name to this specification.

GEORGE H. GILMAN.

